Molding-machine.



No. 664,426. Patented Dec. 25, I900. a. w. PACKER. MOLDING MACHINE- (Application filed Sept. 10, 1900.]

3 Sheets-Sheet I.

(No Nodal.)

mam: PETERS w. wo'roumon WASNINGTON a c Nd. 664,426. Patented Dec. 25, I900.

- v G. W. PACKEB.

MOLDING MACHINE.

(Application filed Sept. 10, 1900.] (No llndal.) 3 Sheets-sheet 2.

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m: nonms PETERS d0. more-mum, msumsron, n. c.

No. 664,426. Patented Dec. 25,1900. 6. w. PACKEB.

MOLDING MACHINE. (Applicatign filed Sept. I lO, 1900.) (No Model.)

3 Sheath-Sheet 3.

'Uivirnnfi- STATES PATENT cam.

eno'nen W. PAOKER, or cnioneo, ILLINOIS.

MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 664,426, dated December 25, 1900.

Application filed September 10, 1

T0 aZZ whom, it may concern:

Be it known thatl, GEORGE W. PACKER, a citizen of the United States, residing at Ohicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Molding-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in'the art to which it appert-ains to make and use the same. i

The invention relates to machines for making sand molds, and particularly to that type where the flask is supported on aplaten which rises and compresses the sand against an overhead'platen that is swung away from over the flask-supporting platen at the completion of the compressing action to permit the'flask to be removed and another replaced on the lower platen.

The machine is adapted to be operated by compressed air; but obviously steam or other motive fluid may be employed instead.

The object aimed at has been to devise a machine of strong and simple construction and one that will be capable of rapid, continuous, and efticient operation by molders who are not skilled workmen.

The invention is illustrated in the accompanying drawings, wherein- Figure 1 is a side elevation of the complete machine. of the same onthe line 2 2 of Fig. 1. Fig. 3 is a central vertical section of the machine on the line 3 3 of Fig. 2., Fig. 4 is a plan view of the sand-screen employed in connection with the machine. Fig. 5 is a detail showing how the pattern-board is guided in its movements. Fig. 6 is a detail of the packing between the piston and the cylinder. .Fig. 7 is a detail of the mechanism for lifting the flask up from its supporting-platen.

Referring to the views, a denotes an upright piston, that is preferably made hollow, withits upper end closed for lightness of construction. At diametrically opposite points on its lower end it is provided with bearings a a. for the through-axle b of trundlingwheels I) b. On one side of the axle the piston is provided with an arm 0, which projects at a right angle to the axle b and carries at its outer end a trailing wheel a, which may be a caster, if preferred. This piston Fig. 2 is-a central vertical section 900. SerialNo-29A80. lNomodel.)

gether with the cooperating cylinder to be presently described, forms the, only frame:

the piston constitutes ahead, and between it and the inner wall of the cylinder is the packing, which preferably consists of a rubber or leather ring 0 secured by means of a metallic annulus around the rabbeted edge 0 of the piston, the annulus being screwed or otherwise fastened down and havinga' wire or cord 0 seated in a groove in'an upturned flange around its edge. I The cylinder carries and supports all the moving parts of the machine except the overhead platen and, as before stated, forms the entire framework of the machine.

The overhead platen is denoted by e. It is of the general shape of the flask and is adjustably connected by nuts 6 to the threaded upper ends 6 of rods ff, that are journaled at their lower ends on the through-axle b between the sides of the piston and the wheels 12.

Rising from the upper end of the cylinder dare four uprights f, carrying at their upper ends the platen g, which supports the flask while the sand is being compressed. This platen is cut out, as usual, to permit the patterns 2 to be projected therethrough into the sand. The uprights are provided on their inner sides with V-shaped guides f and a pattern-board h is arranged to slide up and forms the pedestal of the machine and, to-

the brackets iii .of the pattern-board, and on one end tfhe .sha'fit i is p-rovidedwiitih .a'eramkhandle 11 by means of which the shaft is rocked for the purpose of raising and lowering the pattern-board.

The flask is denoted by .Z. dinary construction and is prov-ided with the usual dowel-pins Z, which register with perforations in small ears or lugs Z projecting shown in Fig. '2. levers rest against the lower ends of "thedoweh' from the upper ends of the uprights The flask rests upon the platen 9 while the comp'ressingef the sand is taking place, and in order to lift it free of the platen'when the mold is completed I pivot to hangers depending from the-platen a couple of levers n n, at each side of the machine, having their free ends projecting toward each other, as best The opposite ends of these board is lowered the innerends of the-levers 1 will be struck and their outer'ends thrown n p for the purpose of pushing the-.dowel-pins out of their. perforations in the lugs-l- -Z thus raising the flask and the mold clear of the platen 1 The screens illustrated in Fig. 4) is for'the purpose of sitting the sandas it is filled into and the upper platen e.

the flask. 'llhisscreen is carried by the horizontal arm of..a crane s, which :is. journaled by its vertical arm in a bracketb projecting from one of theuprights f, the objectof this arrangement being to permit thescreen to be swung to one side out of the way after the flask has been filled.

vFrom the above description, taken in connection-with'the drawings, it will be seen that the piston or constitutes the pedestal or base of the machine and that the cylinder d-carries'and supports all-the working parts, with the single exception of the swinging arms f f T-hepiston and -cyl inder therefore make up the frame of the machine, and'no other supports, pillars, legs, braces, or framing are required.

As before stated, the machine is adapted to be operated by compressed air or other elastic fluid. Figs. land 3 illustrate thepi pe connections for this purpose. 1p denotes a pipe leading from an air-compressor or other sourceinto a valve-casing q,

and p denotes a branch leading from the casing into the cylinder-d, at the top. In the casing there is an ordinary three-way valve, (not necessary to be shown,) and a handle 0, pivoted on the outside of thecasing, is connected by a link or rod to this interior valve, so as It is of the or- In' these figures -to turn the motor fluid into the cylinder or release it therefrom. It will be understood from the above description that the upper platen must be'swung over the flask when the sand is to be compressed and swung .ofi to .one side out of the way in order to permit the removal of the flask. In order to do this automatically, I proyide on each of the pivoted arms f, near their lower ends,blocks t,having their peripheries cam-shaped, as shown in the drawings, and projecting tron: diametrically opposite points near-the lower end of the cylinder d arestuds 15, carrying friction-rollers t These studs project into operative relation to the cam-blocks, and stops or keepers .u-are provided *to hold the parts 'togetherand prevent the blocks from leaving the cams. The studs also'cooperate to prevent the turning of the cylinder 01 with respect to the piston a, and thereby preserve the alineme-nt of the pattern-carrying plate, so as to keeptthe patterns square in the machine. i

The construction being as thus described,

, the operation will be readily understood.

The parts beingin the position shown in Fig. 1, :the pattern-board, having the patterns 2 2 on it, is first raised, so as to position the patterns in the fl-ask;'as'show n in Figs. 2and 3. The sand is then filled in to the flask through the screen, after which the screen is swung to one side, as shown in Fig. 3, and the air is turned into the cylinder. mediately rises, carrying with it the platen g and its flask and the pattern-board h. As soon as the cylinder begins to rise the studs t travel up the cam-surface of the blocks 25. This causes the upper platen e to swing over into position :to meettherrising platen and the flask carried on it. -W hen"the sand has been suflieiently packed, the handle r is operated and the air released'f-rom'the cylinder, which then falls, causing the studs to retrace the surface of the-cam-bloczks tand the arms f f to swing again intothe position shown in Fig. 1. At this time the crankhand le i is operated to lower the board N and withdraw the patterns from the mold. As the board goes down the lovers n n are operated, as already described, and the flask is lifted ed the platen and can be carried away and another put in its place.

Having thus described my invention, what I clai,m is- I '1. In a molding-machine, the combination of a stationary piston, a movable cylinder cooperating therewith, and :a flask-supporting platen carried by the cylinder,an upperswinging platen,-and means cobperating with said cylinder to move said platen over and :from said flask.

' 2. Ina molding-machine, the combination of a stationary piston, a :movable-cylindercooperatingtherewith,aflask-supporting platen carried by the cylinder, a pattern-board also carried by thecylinder, and means tor ad- The cylinder im- IIO justing the patternboard relative to the platen, an upper swinging platen, and means cooperating with said cylinder to move said platen over and from said flask.

3. In a molding-machine, the combination of an upright stationary piston forming the pedestal of the machine, and a movable cylinderinclosing the piston and forming the support for the flaskcarrying platen, the pattern-board, and the mechanism for adjusting and withdrawing the patterns,an upper swinging platen, and means cooperating with said cylinder to move said platen over and from said flask.

4. In a molding-machine, the combination of an upright stationary piston forming the pedestal of the machine, and a movable cylinder inclosing the same, the flask-supporting platen, all carried by said cylinder, an upper swinging platen, and means cooperating with said cylinder to move said platen over and from the flask, the pattern-board, the mechanism for adjusting and withdrawing the patterns, the pipes and valves for admitting the motive fluid, and the means for lifting the flask from the platen.

5. In a molding-machine, the combination of an upright stationary piston forming-the pedestal of the machine, an upper relatively stationary platen pivoted with respect to the piston, a movable cylinder inclosing the piston, a flask-supporting platen and a patternboard carried by said cylinder, said cylinder being also provided with suitable pipes and valves for admitting the motive fluid for operating the same, and means connecting said cylinder and said upper platen, whereby the same is swung over and away from the flask.

6. In a molding-machine, the combination of an upright stationary piston forming the pedestal of the machine, pivoted arms carrying a relatively stationary platen, a movable cylinder inclosing the piston, a movable flasksupporting platen carried by the cylinder, and

a connection between the cylinder and the swinging arms whereby the stationary platen is adjusted toward and from the flask-carrying platen.

7. In a molding-machine, the combination of an upright stationary piston, a movable cylinder inclosing the same, a flask-supporting platen carried by the cylinder on elevated uprights, a pattern-board adjustable up and down between the cylinder and platen, a shaft mounted on the cylinder, andconnections between the shaft and the board, an upper platen pivoted to said piston, means connecting said cylinder and said upper platen to swing the latter over and from the flask.

8. In a molding-machine, the combination of an upright cylindrical piston, a movable cylinder inclosing the same and carrying a flask-supporting platen and a pattern-board, a pair of swinging arms pivoted on an axis fixed with respect to the piston, an overhead platen carried by the arms,cam-blocks mounted on the arms, and studs carried by the cylinder' and engaging the blocks, whereby the overhead platen is swung over and away from the flask, and whereby also the alinement of the cylinder with respect to the piston is preserved.

In testimony whereof Iaflix my signature in presence of two witnesses.

GEORGE W. PAGKER.

Witnesses:

J. A. GOLDSBOROUGH, J. E. HUTOHINSON, Jr. 

